Wootten



N. PETERS. PHOTO-UTHOERAPHER. WASHINGTON. D.

i ilTo aZZi/whomz' concern; f

'e Bei `known"that Jon` l.l `WoTrN-, of Port Richmond,.city'."and county off Philadel- I `vented certain newanduseful Improvement-s iny fthe `Apparatus fork Regulating the Dis- 1f lIt) following "is a full,v clear," and exact descrip# forming Part 3 this` l specification, and `wherein-fof the smoke box l of a "locomotive, and show# i inl lnyfgimprovernents; Fig@l is" a^"=vertical i position "and arrangement. Fig 3 is a V section ofone of these parts, singly, and of made.

l l, Like letters i 730 (C) is a centralsteamichamber," directly i th@ final. discharge of .the steam,

i is formed to fit closely, when required, t0 the `conical orbeveledV edge of the central coneor plug, shown in section at (d). The

part (d) is formed upon the bottom of the "'tojchamber" (C), and is therefore stationary.

The "valve (o) may be elevated or depressed,

by an arrangementwhichwill be hereafter explainedgjand in proportion to its eleva tion or depression will it increase or dimin-` ish the openingbetween its lower edge, and e the beveled seatupon the plug (d). Through p this opening, when the valve is raised from .i itsseat, the exhaustfsteam is finally. dis- Wcharged. The drawings show the valve (c) .5Q`upon its seat, leaving no opening for the escape of steam. lThis opening is only obtained, and graduated, when the engine is in .y use, by the operationof partshcreinafter described.` l. (D) is a steam cylinder', ,suspended upon www phiaand stateloffrensylvana; haven-1 charge oftheExhaustfSteam in Loco-inotive Engines, commonly known as the Variable lllxhaustv; and I" do hereby ,declare that the tion of thelnature and operation ofthe same. Referenceis had "to the annexed drawings,

\ ing,externallyfthe essential" parts embraced sectionof these` parts`,"in"their proper work# y livhich full description,`1 `be hereafter pipe, connecting with the steam passage (g) underthe` chimneyand open to both exhaust l pipesand containingthe regulatingvalve: for enlargingorcontractng the opening `for n roniucn. y.

` i @JOHN nl f woorrNfl or PHILADELHIA, PENNSYLVANIA.

l `1spefci"stationor nettersfratent N6, 12,865, dated May] 1, 1855.

` trunnionsl (f) (g) and being capable of an oscillating motion thereon.

(E) is` a pistonffltting closely within the cylinder, and having a rod, (e) through one head o-f the cylinderfas shown in the sections Figs.u 2"and 3.. A steam passage is formed throughfeachtrunnion, the twopassages ex- "tending to opposite ends ofthecylinder, as shown in F ig. 3*, which is a horizontal section of the cylinder, in theplane of itsglongitudinal and transverse aXes.

\ The trunnions (f) and (g) `project out- `fARRaNGMENTioFMEANs FQRHREGULAT'INGTHE"DISCHARGE of EXHAUST-STEAM "V f `I1\T` noCoil/3:0'ruins I w y i ward, beyond `the bearings 1n which the cyli e inderissuspendedUpon the outer surface f `15 "Fig replis afgeneral view of the niterlo-rv ofeach` trunnion is` formed a screw, for attachmg a lsuitablecoupling or connection, for a-'wstea-m pipe. In the drawing, these 'pipes `are notshown, as `they are ,but continuations of the respective passages, (f) and*A The pipe, `conr'iecting directly "withthe steam passage (f), is extended to or water therein, and totransmit the same through the steam` passage (f), to the corresponding face of the piston (E). The

7 is extended thro-ugh the bottom plate of the smoke box, and attached at` any convenient point upon the chamber (C) and to communicate freely with it.- This pipe-therefore in thechamber (C), directly to that face of the piston which corresponds to the passage (g). When both of the steam pipes are properly connected, the piston (E) is pressed upon one side by steam, or water, directly from the boiler; and on the other side by steam from the exhaust steam chamber (C). The piston ro-d (e), is connected to the upper end of the arm or lever, z.) fastened to a shaft (i), on which is `also fastened an arm (j), at right angles with arm (h). A link (7c) connects the outer end of arm (j) with a cross-beam (Z), to `which are attached upright rods (m) (m), attached also at their upper ends to the regulating valve- (c). The connections of the several parts are so made, (as clearly exhibited in Fig. 2) that the valve (c) shall be elevated or depressed by the movement of the piston (E) in the cylinder (D). Between the` cro-ss-beam (Z) and a block on the g transmits thepressure of the exhaust steam, i Y (o) is a tube or valve, whose bottom edge l boiler, acting on the piston (E), and in com-` bination with the elasticity of the spring` (n), the two forces acting reciprocally on each other, operates to regulate the position of the valve (c) and thereby the area of the discharging passage of the steam, from the exhaust steam chamber (C).

Whenever, in any position of the parts,.

the pressure on the piston shall exceed the elasticity of the spring, the piston will be moved in the cylinder. (D), and by its intermediate connections will raise the valve (c), giving a larger opening for the escape of the exhaust steam, and thereby diminishing its force of discharge. By diminishing the force with which the exhaust steam is discharged, the draft through the tubes of the locomotive, is also diminished,-as with the variable exhausts 7 already in use.

Whenever, in any position, the pressure on the piston shall be less than the elasticity of the spring the latter will draw down the valve- (c) closer to its seat, whereby the force of discharge 'of the exhaust steam will be increased, and thereby the strength of the draft upon the fire of the locomotive.

As before described, the passage (g) of the cylinder (D), communicates by a pipe with the interior of the chamber (C). The object of this communication is that of counteracting, within the cylinder (D), the effect of the pressure of the exhaust steam on the lower edge of the valve The area of the piston (E), and of the annular section of the tubular valve, (c), are in such proportion to each other that a pressure upon one, acting through the levers (h) duce a stronger or weaker discharge of the exhaust steam, under a given pressure of steam within the boiler, a slot is made in the outer end of the arm (j), in which the link (la) can be fastened by a screw and nut, at different distances from the shaft (z'). When the lower end of the link (7c) is fastened in the end of the slot nearest the shaft (i), the pressure on the piston (E) is transmitted through an increased leverage to move the valve (c), and to raise it higher from its seat than if the end of the link (7c) had been fastened in the outer end of the slot in the arm (j). The adjustment of the lower end of the link (k), within the slot, may be made by means of a screw and nut, as shown in the drawing; or, if thought necessary, the link might be attached to a hand lever, within constant reach of the engineman, to be regulated at his pleasure.

Having thus fully described the nature and operation of my improvement, what I claim as my invention, and desire to secure by Letters Patent, isf- The arrangementv of the piston E, within the cylinder D, in communication with the steam or water space of the boiler, and with t-he exhaust chamber C, in relation to the spring n, rods and levers and beams b, y', 7c, Z, m, and Valve c, operating as, and for the purposes herein set forth.

JOHN E. WOOTTEN.

Witnesses:

C. F. Hass, GEO. M. CLARKE. 

